On his first day of high school, Hitohito Tadano's plan to blend in takes a nosedive when he unwittingly sits next to the school's idol, Shouko Komi. Known for her beauty and popularity, Komi harbors a secret struggle with anxiety and communication barriers. Through a series of silent exchanges on the blackboard, Tadano becomes her ally in her quest to make a hundred friends, marking the beginning of an unlikely friendship.